Selective adsorption of thiophene using a HIPZD additive in FCC

Aponte, Yira; Djaouadi, Djamal; Lasa, Hugo de

doi:10.1016/j.fuel.2014.02.027

Cited by 22 publications

(9 citation statements)

References 29 publications

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“…This is in agreement with the observation of others. 7,29 Furthermore, Figure 3 provides Raman spectra for the three OFF zeolites of the present study. One can notice that all recorded bands in the OFF remain unmodified with zinc addition.…”

Section: Resultsmentioning

confidence: 99%

“…Zeolites of the offretite (OFF) family have been identified as having good prospects for a number of chemical processes such as (a) the transformation of toluene and the isomerization of m-xylene, 1,2 (b) the catalytic selective reduction of NOx using Cu (II) ion exchange, 3 (c) methanol conversion using an OFF protonic form 4 (d) n-hexane conversion to C 3 hydrocarbons and o-xylene conversion to p-xylene, 5 and (e) CO 2 adsorption using K-OFF. 6 Recently, the CREC research team at the Chemical Reaction Engineering Center, The University of Western Ontario, proposed a new application for OFF zeolites 7,8 in FCC units. They can be used as an additive for sulfur reduction in gasoline (refer to Figure 1).…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the CREC research team at the Chemical Reaction Engineering Center, The University of Western Ontario, proposed a new application for OFF zeolites , in FCC units. They can be used as an additive for sulfur reduction in gasoline (refer to Figure ).…”

Section: Introductionmentioning

confidence: 99%

“…They can be used as an additive for sulfur reduction in gasoline (refer to Figure ). This selective adsorption takes advantage of the OFF topology consisting of eight smaller member ring pores and OFF acid sites. − Changes in the configuration of the cyclones allow one to collect a thiophenic-rich stream from the outlet gases from the stripper.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH₃-TPD Desorption Models

Aponte

Lasa

2017

Ind. Eng. Chem. Res.

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This article reports the effect of adding zinc to an offretite (OFF) zeolite. It is observed that zinc addition does not significantly change the specific surface area, the pore volume, or the pore size distribution. It is noticed, however, that zinc addition influences acid properties of the OFF significantly. For instance, when employing FTIR pyridine adsorption, it is observed that in the Zn-OFF, there are 2.5 times higher Lewis acid sites than Brönsted acid sites. Furthermore, when applying NH3-TPD, three acid sites were identified: (a) abundant number of weak acid sites, (b) fair number of moderate acid strength sites, and (c) scarce number of strong acid sites. Furthermore, NH3 desorption kinetic parameters were also calculated. Two numerical methodologies, linear and nonlinear regression, were implemented. It was noticed that E d augments with zinc as E d for OFF < E d for Zn(2.0 wt %)-OFF < E d for Zn(3.5 wt %)-OFF.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH₃-TPD Desorption Models

Aponte

Lasa

2017

Ind. Eng. Chem. Res.

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“…[ 57–60 ] Sulphur is considered as a poison of the metallic function because it adsorbs on the metal sites but it could also be adsorbed on the acid sites of the support. [ 19–22,61,62 ]…”

Section: Resultsmentioning

confidence: 99%

Influence of the Ir content and the support on the thiotolerance of the Ir/SiO₂‐Al₂O₃ catalysts for selective ring opening of decalin

et al. 2020

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The influence of Ir content on sulphur tolerance for the selective ring opening of decalin was investigated. Ir/SiO2‐Al2O3 catalysts (70 wt% and 80 wt% SiO2) were used. In the absence of sulphur, slight differences were observed on the yields according to the metallic content regardless of the support used. Although the results of cyclopentane hydrogenolysis showed that the metallic function acquires importance as the metal content increases, for these metal percentages the acid function limits the rate of decalin opening reaction. Products distribution are strongly modified using decalin with S content compared to pure decalin. The formation of dehydrogenated products is virtually null due to S adsorbed on the metal sites. The support has low influence on the thiotolerance. The results, related to the amount of S per Ir surface atom, showed that for a moderate S content (S/Irsurf ∼ 0.30), 1.5 Ir/Sy appears to be less poisoned than 1Ir/Sy and 2Ir/Sy.

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Catalytic Cracking of Petroleum Feedstock in the Presence of Additives Derived from Cross–Linked Mesoporous Oxides for Reduction of the Sulfur Content in Liquid Products

Glotov

Кардашев

Egazar’yants

et al. 2016

Chem Technol Fuels Oils

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Selective adsorption of thiophene using a HIPZD additive in FCC

Cited by 22 publications

References 29 publications

The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH₃-TPD Desorption Models

The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH₃-TPD Desorption Models

Influence of the Ir content and the support on the thiotolerance of the Ir/SiO₂‐Al₂O₃ catalysts for selective ring opening of decalin

Catalytic Cracking of Petroleum Feedstock in the Presence of Additives Derived from Cross–Linked Mesoporous Oxides for Reduction of the Sulfur Content in Liquid Products

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Selective adsorption of thiophene using a HIPZD additive in FCC

Cited by 22 publications

References 29 publications

The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH3-TPD Desorption Models

The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH3-TPD Desorption Models

Influence of the Ir content and the support on the thiotolerance of the Ir/SiO2‐Al2O3 catalysts for selective ring opening of decalin

Catalytic Cracking of Petroleum Feedstock in the Presence of Additives Derived from Cross–Linked Mesoporous Oxides for Reduction of the Sulfur Content in Liquid Products

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The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH₃-TPD Desorption Models

The Effect of Zn on Offretite Zeolite Properties. Acidic Characterizations and NH₃-TPD Desorption Models

Influence of the Ir content and the support on the thiotolerance of the Ir/SiO₂‐Al₂O₃ catalysts for selective ring opening of decalin